(19)

(11)

EP 0 764 042 A1

(12)

(43) Date of publication: 26.03.1997 Bulletin 1997/13 (21) Application number: 95929305.0 (22) Date of filing: 02.06.1995

(51) International Patent Classification (IPC):  B01D 11/ 00( . ) B01D 11/ 04( . ) B09C 1/ 02( . ) C01G 43/ 00( . ) C22B 3/ 16( . ) C22B 3/ 26( . ) C22B 3/ 38( . ) G21F 9/ 12( . ) B01D 11/ 02( . ) B08B 7/ 00( . ) C01F 17/ 00( . ) C02F 1/ 62( . ) C22B 3/ 24( . ) C22B 3/ 32( . ) C22B 7/ 00( . ) (86) International application number: PCT/US1995/006938 (87) International publication number: WO 1995/033542 (14.12.1995 Gazette 1996/01)

(84) Designated Contracting States: BE CH DE ES FR GB IT LI NL SE (30) Priority: 02.06.1994 US 19940253000 (71) Applicant: IDAHO RESEARCH FOUNDATION, INC. Moscow, ID 83843-0178 (US)	(72) Inventors: WAI, Chien Moscow, ID 83843 (US) SMART, Neil Moscow, ID 83843 (US) LIN, Yuehe Moscow, ID 83843 (US) (74) Representative: Gowshall, Jonathan Vallance  FORRESTER & BOEHMERT Franz-Joseph-Strasse 38 80801 München 80801 München (DE)